Drivers approaching the intersection of Interstate 405 and Interstate 90 in Bellevue should expect long delays starting at midnight on Sunday, Monday, Tuesday and Wednesday (July 29-31, and Aug. 1), as Seattle City Light crews work on power lines above the interchange.

The work is part of the state Department of Transportation’s South Bellevue I-405 Widening project. Crews will disconnect the power lines, place them on a new, taller pole, and reconnect them to the existing pole southwest of the I-90/I-405 interchange. During the operation, residents will not lose power.

Each night from midnight and 4 a.m., the Washington State Patrol will conduct intermittent, rolling slowdowns in both directions of I-405 and I-90 near the I-405/I-90 interchange. Work-related complications could produce up to 60-minute delays. During the slowdown, crews will close the following ramps to prevent traffic from entering the freeway: